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A082105 A symmetric square array of numbers, read by antidiagonals. 6
1, 1, 1, 1, 6, 1, 1, 13, 13, 1, 1, 22, 33, 22, 1, 1, 33, 61, 61, 33, 1, 1, 46, 97, 118, 97, 46, 1, 1, 61, 141, 193, 193, 141, 61, 1, 1, 78, 193, 286, 321, 286, 193, 78, 1, 1, 97, 253, 397, 481, 481, 397, 253, 97, 1, 1, 118, 321, 526, 673, 726, 673, 526, 321, 118, 1, 1, 141, 397 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,5

COMMENTS

Rows include A028872, A082109. Main diagonal is A082106. Other diagonals include A047673. Diagonal sums (row sums if viewed as number triangle) are A082107

LINKS

Table of n, a(n) for n=0..68.

FORMULA

Square array defined by T(n, k)=(k^2n^2+4kn+1)

EXAMPLE

Rows start

1 1 1 1 1 ...

1 6 13 22 33 ...

1 13 33 61 97 ...

1 22 61 118 193...

1 33 97 193 321...

CROSSREFS

Cf. A082043, A082046.

Sequence in context: A202673 A202875 A203956 * A230073 A143210 A205133

Adjacent sequences:  A082102 A082103 A082104 * A082106 A082107 A082108

KEYWORD

easy,nonn,tabl

AUTHOR

Paul Barry, Apr 03 2003

STATUS

approved

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Last modified December 7 05:14 EST 2019. Contains 329839 sequences. (Running on oeis4.)